101 lines
2.7 KiB
Go
101 lines
2.7 KiB
Go
package objects
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import "math"
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import "strconv"
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import "git.tebibyte.media/tomo/tomo"
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import "git.tebibyte.media/tomo/tomo/input"
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import "git.tebibyte.media/tomo/tomo/event"
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import "git.tebibyte.media/tomo/objects/layouts"
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// NumberInput is an editable text box which accepts only numbers, and has
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// controls to increment and decrement its value.
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type NumberInput struct {
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tomo.ContainerBox
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input *TextInput
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increment *Button
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decrement *Button
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on struct {
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valueChange event.FuncBroadcaster
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confirm event.FuncBroadcaster
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}
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}
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// NewNumberInput creates a new number input with the specified value.
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func NewNumberInput (value float64) *NumberInput {
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box := &NumberInput {
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ContainerBox: tomo.NewContainerBox(),
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input: NewTextInput(""),
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increment: NewButton(""),
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decrement: NewButton(""),
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}
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box.SetRole(tomo.R("objects", "NumberInput", ""))
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box.Add(box.input)
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box.Add(box.decrement)
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box.Add(box.increment)
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box.SetLayout(layouts.Row { true, false, false })
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box.increment.SetIcon(tomo.IconValueIncrement)
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box.decrement.SetIcon(tomo.IconValueDecrement)
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box.SetValue(value)
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box.CaptureScroll(true)
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box.CaptureKeyboard(true)
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box.OnScroll(box.handleScroll)
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box.OnKeyDown(box.handleKeyDown)
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box.input.OnConfirm(box.handleConfirm)
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box.input.OnValueChange(box.on.valueChange.Broadcast)
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box.increment.OnClick(func () { box.shift(1) })
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box.decrement.OnClick(func () { box.shift(-1) })
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return box
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}
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// Value returns the value of the input.
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func (this *NumberInput) Value () float64 {
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value, _ := strconv.ParseFloat(this.input.Text(), 64)
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return value
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}
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// SetValue sets the value of the input.
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func (this *NumberInput) SetValue (value float64) {
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this.input.SetText(strconv.FormatFloat(value, 'g', -1, 64))
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}
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// OnValueChange specifies a function to be called when the user edits the input
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// value.
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func (this *NumberInput) OnValueChange (callback func ()) event.Cookie {
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return this.on.valueChange.Connect(callback)
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}
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// OnConfirm specifies a function to be called when the user presses enter within
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// the number input.
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func (this *NumberInput) OnConfirm (callback func ()) event.Cookie {
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return this.on.confirm.Connect(callback)
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}
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func (this *NumberInput) shift (by int) {
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this.SetValue(this.Value() + float64(by))
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this.on.valueChange.Broadcast()
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}
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func (this *NumberInput) handleKeyDown (key input.Key, numpad bool) {
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switch key {
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case input.KeyUp: this.shift(1)
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case input.KeyDown: this.shift(-1)
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default: this.input.handleKeyDown(key, numpad)
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}
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}
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func (this *NumberInput) handleScroll (x, y float64) {
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if x == 0 {
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this.shift(-int(math.Round(y)))
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} else {
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this.input.handleScroll(x, y)
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}
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}
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func (this *NumberInput) handleConfirm () {
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this.SetValue(this.Value())
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this.on.confirm.Broadcast()
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}
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